Release v2.9.0 (#334)

Author: araffin

docs/misc/changelog.md

@@ -2,7 +2,7 @@
 
 # Changelog
 
-## Release 2.9.0a2 (WIP)
+## Release 2.9.0 (2026-06-15)
 
 ### Breaking Changes:
 - Upgraded to Stable-Baselines3 >= 2.9.0
@@ -14,7 +14,6 @@
 ### Deprecations:
 
 ### Others:
-
 - Optimized tests (faster to run)
 
 ### Documentation:

sb3_contrib/version.txt

@@ -1 +1 @@
-2.9.0a2
+2.9.0

setup.py

@@ -67,7 +67,7 @@
     packages=[package for package in find_packages() if package.startswith("sb3_contrib")],
     package_data={"sb3_contrib": ["py.typed", "version.txt"]},
     install_requires=[
-        "stable_baselines3>=2.9.0a2,<3.0",
+        "stable_baselines3>=2.9.0,<3.0",
     ],
     description="Contrib package of Stable Baselines3, experimental code.",
     author="Antonin Raffin",